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Minjera, Buzet, Istria County, Croatiai
Regional Level Types
Minjera- not defined -
BuzetTown
Istria CountyCounty
CroatiaCountry

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Latitude & Longitude (WGS84):
45° 23' 6'' North , 13° 55' 35'' East
Latitude & Longitude (decimal):
45.38519,13.92666
GeoHash:
G#: u21fhyj5f
GRN:
N31E08
Köppen climate type:
Cfa : Humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
Vrh124 (2016)3.2km
Buzet6,059 (2016)4.1km
Štrped189 (2016)4.8km
Pregara153 (2014)7.9km
Motovun531 (2016)9.4km
Mindat Locality ID:
266135
Long-form identifier:
mindat:1:2:266135:6
GUID (UUID V4):
0
Name(s) in local language(s):
Minjera, Buzet (Pinguente), Istarska županija (Regione istriana), Hrvatska


Bauxite deposits located in the valley of River Mirna (Quieto) in the upper part of rudist limestones (Late Cretaceous), in Paleocene limestones, and at the base of alveolinic-nummulitic limestones (Eocene).

Starting from the 16th century the pyritised bauxites of Minjera have been exploited mainly for the production of vitriol and alum. Their first chemical-mineralogical study is due to Pietro Turini (1808).

Furthermore, a large extrusion, made of goethite and in small part of phyllosilicates (mainly kaolinite), has been identified in Eocenic limestones near a large tectonic dislocation and the Sveti Stjepan (Santo Stefano) thermal springs (Merlak, 2013).

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


13 valid minerals.

Detailed Mineral List:

ⓘ Anatase
Formula: TiO2
ⓘ Böhmite
Formula: AlO(OH)
ⓘ Calcite
Formula: CaCO3
ⓘ 'Chlorite Group'
ⓘ Gibbsite
Formula: Al(OH)3
ⓘ Goethite
Formula: Fe3+O(OH)
ⓘ Gypsum
Formula: CaSO4 · 2H2O
ⓘ Hematite
Formula: Fe2O3
ⓘ Kaolinite
Formula: Al2(Si2O5)(OH)4
ⓘ Marcasite
Formula: FeS2
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Muscovite var. Illite
Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2
ⓘ Pyrite
Formula: FeS2
ⓘ Quartz
Formula: SiO2
ⓘ 'Tourmaline'
Formula: AD3G6 (T6O18)(BO3)3X3Z
ⓘ Zircon
Formula: Zr(SiO4)

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘPyrite2.EB.05aFeS2
ⓘMarcasite2.EB.10aFeS2
Group 4 - Oxides and Hydroxides
ⓘGoethite4.00.Fe3+O(OH)
ⓘHematite4.CB.05Fe2O3
ⓘQuartz4.DA.05SiO2
ⓘAnatase4.DD.05TiO2
ⓘGibbsite4.FE.10Al(OH)3
ⓘBöhmite4.FE.15AlO(OH)
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘGypsum7.CD.40CaSO4 · 2H2O
Group 9 - Silicates
ⓘZircon9.AD.30Zr(SiO4)
ⓘMuscovite
var. Illite		9.EC.15K0.65Al2.0[Al0.65Si3.35O10](OH)2
ⓘ9.EC.15KAl2(AlSi3O10)(OH)2
ⓘKaolinite9.ED.05Al2(Si2O5)(OH)4
Unclassified
ⓘ'Chlorite Group'-
ⓘ'Tourmaline'-AD3G6 (T6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
Hⓘ BöhmiteAlO(OH)
Hⓘ GibbsiteAl(OH)3
Hⓘ GoethiteFe3+O(OH)
Hⓘ GypsumCaSO4 · 2H2O
Hⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Hⓘ KaoliniteAl2(Si2O5)(OH)4
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
BBoron
Bⓘ TourmalineAD3G6 (T6O18)(BO3)3X3Z
CCarbon
Cⓘ CalciteCaCO3
OOxygen
Oⓘ AnataseTiO2
Oⓘ BöhmiteAlO(OH)
Oⓘ CalciteCaCO3
Oⓘ GibbsiteAl(OH)3
Oⓘ GoethiteFe3+O(OH)
Oⓘ GypsumCaSO4 · 2H2O
Oⓘ HematiteFe2O3
Oⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Oⓘ KaoliniteAl2(Si2O5)(OH)4
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ QuartzSiO2
Oⓘ TourmalineAD3G6 (T6O18)(BO3)3X3Z
Oⓘ ZirconZr(SiO4)
AlAluminium
Alⓘ BöhmiteAlO(OH)
Alⓘ GibbsiteAl(OH)3
Alⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Alⓘ KaoliniteAl2(Si2O5)(OH)4
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Siⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Siⓘ KaoliniteAl2(Si2O5)(OH)4
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ QuartzSiO2
Siⓘ ZirconZr(SiO4)
SSulfur
Sⓘ GypsumCaSO4 · 2H2O
Sⓘ MarcasiteFeS2
Sⓘ PyriteFeS2
KPotassium
Kⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ CalciteCaCO3
Caⓘ GypsumCaSO4 · 2H2O
TiTitanium
Tiⓘ AnataseTiO2
FeIron
Feⓘ GoethiteFe3+O(OH)
Feⓘ HematiteFe2O3
Feⓘ MarcasiteFeS2
Feⓘ PyriteFeS2
ZrZirconium
Zrⓘ ZirconZr(SiO4)

Other Regions, Features and Areas containing this locality

Eurasian PlateTectonic Plate
EuropeContinent

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References

Turini P. (1808): Preparazione dell’Allume nella miniera di S. Pietro nel Dipartimento dell’Istria. Stamperia di Antonio Curti q. Giacomo, Venezia, 67 pp.
Šinkoveć, B. (1974) The origin of terra rossa in Istria. Geol. Viesnik, 27, 227-237.
Sakač, K. and Vujec, S. (1988) History of bauxite mine exploration in Yugoslavia. VI Yugosl. simpozij istraz. eksploat. Boksita. Zbornik radova, 279-286.
Marusič, R., Sakač, K., and Vujec, S. (1993) Four century of bauxite mining. Rudarsko-Geološko-nafti Zbornik, 5, 15-20.
Sakač, K., Vujec, S., and Marušič, R. (1993) “Minjera” svjetski značajan minerloški i rudarski lokalitet Istre. Buzetski zbornik, 18, 49-77.
Šinkoveć, B., Sacać, K., and Durn, G. (1994) Pyritized bauxites from Minjera, Istria, Croatia. Natura Croatica, 3, 41-65.
Gabrić, A., Galović, I., Sakać, K., and Hvala M. (1995) Mineral deposits of Istria – Some deposits of Bauxite, Building Stones and Quartz “Sand”. Hrvatski Geološki Kongres, First Croatian Geological Congress, Excursion Guide Book, 1, 111-137.
Marusič, R., Sakač, K., and Vujec, S. (1995) The World’s oldest bauxite mining. Travaux ICSOBA, 22, 81-98.
Merlak E. (2011): Speleotemi in due giacimenti di bauxiti piritizzate (Valle della Mirna - località Minjera - Istria centrale - Croazia). Progressione, 57, 122-128
Merlak E. (2012): Indirect dating of two speleothems in a field of pyritized bauxites (Mirna Valley – Minjera – Central Istria – Croatia). II International Symposium on Mine Caves. Iglesias, 26-29 aprile 2012. Abstracts Book, 23-24.
Merlak E. (2013): Prime indagini su estrusioni da micro-fessurazioni di ossidi di ferro (goethite) in terreni carsici di Dalmazia, Istria e Carso triestino. In: Cucchi F., Gudi P. (eds.), Atti del XXI Congresso Nazionale di Speleologia “Diffusione delle conoscenze”, Sessione Attività di esplorazione e ricerca. Trieste 2-5 giugno 2011. Edizioni Università di Trieste, Trieste, 427-432.
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